Booma-RC DLE30 User manual

DLE30
Users Manual
SAFETY NOTICE
This engine is not toy. For your own safety, please read the manual carefully before oper-
aon. Never allow children under the age of 18 to operate this engine without supervi-
sion. You are responsible for the safe operaon of this engine.
Before every use, check the engine assembly, propeller and airframe carefully for loose
screws and nuts. Locte 242 Blue (or similar) is strongly recommended on all the screws.

ENGINE MOUNTING
During the break-in process the engine must be installed in an environment where vibraon can be ab-
sorbed i.e. in the model or with so mount if bench running. Hard mounng to a bench without adequate
vibraon damping may cause vibraon damage to internal parts and shorten the life of the engine. The
best way for break-in process is mount the engine in the model.
Always stand clear of and behind the propeller; never allow anyone including yourself, to be in front of or
to the sides of the propeller when starng or running the engine. Anyone near the engine should wear
protecve eyewear. NEVER WEAR LOOSE CLOTHING near the engine or propeller.
SPECIFICATIONS
• 3.7HP/8500rpm
• Idle Speed: 1600 rpm/min.
• Stac Thrust 8.5Kg / 100 meters Altude
• Stac Thrust 7.5Kg / 1800 meters Altude
• Recommended propeller: 18x8 ; 18x10 ; 19x8 ; 20x8
• Sparking plug：NGK CM6 2
• Displacement : 30cm3
• Piston Diameter × stroke: 36mm×30mm
• Compression Rao: 7.6：1
• Recommended Oil Rao : 30:1
• Weight: Main engine - 920g Exhaust pipe - 60g Ignion equipment - 130g
• Ignion voltage 4.8V-14V

ENGINE ADJUSTMENT
Every engine has been adjusted to average mixture sengs which will most likely allow the engine to
start and run in most locaons. However, as altudes and barometric pressures vary by locaon, it is very
likely that the carburetor mixture sengs will need to be adjusted to obtain opmum performance.
(1) Choke Lever (2) Throle Lever (3) Idle Speed Adjustment Screw
(4) Low Speed Mixture Adjustment Screw (5) High Speed Mixture Adjustment Screw
ADJUSTMENT: A general starng point is 1.25 turns out for the low speed needle (4), and 1.5 turns out
for the high speed needle (5).
Low Speed Adjustment Adjust the Low needle unl you achieve a smooth idle and a reliable transion to
high throle. If the engine dies when the throle is advanced, the mixture is likely too lean. If the engine
stumbles when the throle is advanced, the mixture is likely too rich.
High Speed Adjustment The High Speed needle adjusts the mid and high RPM mixture seng. Best prac-
ce is to set the high speed needle to achieve maximum RPM and then open an 1/8 of a turn to allow for
altude. If ever the engine slows or stops while at full throle, the high speed mixture is most likely too
lean. In this situaon open the High Speed Screw 1/8 to 1/4 of a turn.
Cauon: Don't be tempted to run an overly rich mixture. A too rich mixture will only result in poor en-
gine performance (engine stopping or spluering when accelerang or deaccelerang), pre-mature car-
bon buildup, a fouled plug and excessive exhaust residue. However, a lean mixture will also damage
the cylinder and piston. A lean run engine is not covered under warranty.
During break in and aer few runs at full throle we suggest you unscrew and check the spark plug, it
appears to be a slight yellow colour if mixture had been set properly.

GENERAL ENGINE OPERATION
Fuel—Please use non Ethanol 92 or 95 Octane fuel with an oil rao of 30:1 for general use. 40:1 may be
used once the engine is run in and if you a re using a high quality fully synthec oil. Do not use dierent
types or brands of engine oil. Doing so may cause carburetor fouling. We recommend 30:1 full synthec
for break in and. Aer the engine has been run for a period of 2 to 3 hours you can decrease oil to 40:1
full synthec oil. For prolonged life we do recommend 30:1.
Breaking-in - Start the engine and (if necessary) adjust the idle mixture (low speed mixture screw). Idle
unl the engine warms and slowly increase the RPM. DON’T be tempted to run at full throle for the rst
tank of fuel. Run at short bursts of 1 or 2 seconds at up to 4500RPM and back to mid throle then to idle.
Connue with this process for 2 hours while gradually increasing the upper RPM and duraon of high
RPM. If the engine sags in RPM when run at high RPM throle back immediately. Stop the engine and ad-
just the high speed mixture screw 1/8 of a turn out. Restart and retest the engine.
Low RPM running- don’t be tempted to let the engine run at low speed for an excessive amount of me
as this may create carbon build up on the spark plug.
Fuel Line– Periodically (or if running become errac) check the fuel line for possible pin holes or air leaks.
NOTICE: The carburetor fuel screen should be cleaned periodically. Carefully remove the pump cover
(inlet side of the carburetor), gasket and pump membrane. The screen will be visible and can be cleaned
WARRANTY INFORMATION
All the DLE engines enjoy one year parts and labour warranty when run as per factory instrucons, used
with specied propellers, correct lubricants and lubricant raos.
Your new DL engine number and purchase date will be recorded for warranty purposes. Please also retain
your purchase invoice as addional warranty proof.
PLEASE NOTE: The following uses may/will damage the engine and are not covered by warranty.
* Running a DL Engine without oil or too lile oil.
* Running the engine with incorrect sized propeller. Oversized propellers can increase stress and wear on
internal components and give poorer torque and thrust performance.
* Undersized propellers may cause too high RPM and over stress the engine.
* Running the engine without adequate cooling may cause overheat damage. Please ensure the engine
has adequate ducng to force air over the cylinder cooling ns with a minimum 1:3 cooling air Inlet to
outlet rao recommended. Addional venturi ns on the air outlet will assist to draw air.
Please Note: Simply mounng an engine in the engine cowl without proper ducng is considered inade-
quate cooling.
Contact Details
BOOMA RC
P.O Box 1 Oak Flats NSW 2529
Telephone: [phone]
www.boomarc.com